120 lines
2.8 KiB
C#
120 lines
2.8 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using System.Drawing;
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namespace OpenRA.Graphics
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{
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public class LineRenderer : Renderer.IBatchRenderer
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{
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static readonly float2 Offset = new float2(0.5f, 0.5f);
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readonly Renderer renderer;
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readonly IShader shader;
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readonly Vertex[] vertices;
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int nv = 0;
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float lineWidth = 1f;
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public LineRenderer(Renderer renderer, IShader shader)
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{
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this.renderer = renderer;
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this.shader = shader;
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vertices = new Vertex[renderer.TempBufferSize];
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}
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public float LineWidth
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{
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get
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{
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return lineWidth;
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}
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set
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{
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if (LineWidth != value)
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Flush();
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lineWidth = value;
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}
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}
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public void Flush()
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{
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if (nv > 0)
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{
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renderer.Device.SetBlendMode(BlendMode.Alpha);
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shader.Render(() =>
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{
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var vb = renderer.GetTempVertexBuffer();
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vb.SetData(vertices, nv);
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renderer.SetLineWidth(LineWidth);
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renderer.DrawBatch(vb, 0, nv, PrimitiveType.LineList);
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});
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renderer.Device.SetBlendMode(BlendMode.None);
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nv = 0;
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}
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}
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public void DrawRect(float2 tl, float2 br, Color c)
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{
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var tr = new float2(br.X, tl.Y);
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var bl = new float2(tl.X, br.Y);
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DrawLine(tl, tr, c, c);
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DrawLine(tl, bl, c, c);
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DrawLine(tr, br, c, c);
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DrawLine(bl, br, c, c);
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}
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public void DrawLine(float2 start, float2 end, Color startColor, Color endColor)
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{
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renderer.CurrentBatchRenderer = this;
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if (nv + 2 > renderer.TempBufferSize)
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Flush();
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vertices[nv++] = new Vertex(start + Offset,
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startColor.R / 255.0f, startColor.G / 255.0f,
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startColor.B / 255.0f, startColor.A / 255.0f);
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vertices[nv++] = new Vertex(end + Offset,
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endColor.R / 255.0f, endColor.G / 255.0f,
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endColor.B / 255.0f, endColor.A / 255.0f);
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}
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public void FillRect(RectangleF r, Color color)
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{
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for (var y = r.Top; y < r.Bottom; y++)
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DrawLine(new float2(r.Left, y), new float2(r.Right, y), color, color);
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}
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public void FillEllipse(RectangleF r, Color color)
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{
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var a = (r.Right - r.Left) / 2;
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var b = (r.Bottom - r.Top) / 2;
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var xc = (r.Right + r.Left) / 2;
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var yc = (r.Bottom + r.Top) / 2;
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for (var y = r.Top; y <= r.Bottom; y++)
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{
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var dx = a * (float)Math.Sqrt(1 - (y - yc) * (y - yc) / b / b);
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DrawLine(new float2(xc - dx, y), new float2(xc + dx, y), color, color);
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}
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}
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public void SetViewportParams(Size screen, float zoom, int2 scroll)
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{
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shader.SetVec("Scroll", scroll.X, scroll.Y);
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shader.SetVec("r1", zoom * 2f / screen.Width, -zoom * 2f / screen.Height);
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shader.SetVec("r2", -1, 1);
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}
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}
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}
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